How do filesystems handle concurrent read/write?

Posted by kemp on Stack Overflow See other posts from Stack Overflow or by kemp
Published on 2010-05-01T22:15:13Z Indexed on 2010/05/01 22:27 UTC
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User A asks the system to read file foo and at the same time user B wants to save his or her data onto the same file. How is this situation handled on the filesystem level?

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